CARBURETORS 6M -9
B E L O W G O V E R N E D S P E E D
( A T H I G H S P E E D O R H E A V Y L O A D W I T H
S E C O N D A R Y T H R O T T L E P L A T E S O P E N )
S E C O N D A R Y
C O N T R O L V A L V E
( H E L D C L O S E D B Y
D I A P H R A G M
S P R I N G T E N S I O N )
I N C R E A S E D V A C U U M F R O M
P R I M A R Y V E N T U R I O P E N S
S E C O N D A R Y T H R O T T L E P L A T E S
Fig. H8A~Secondary Control Valve O peration (below Governed Speed)
A sse m b le Subassem blies
1.
Invert the main body, align new throttle body to main
body gasket, then position throttle body assembly and
install the screws and tighten securely.
2. Using a new gasket, install secondary throttle operating
assembly on main body and tighten securely. Install
operating rod and clip on secondary throttle lever.
3.
Install new governor body gaskets in main body.
4.
Install throttle shaft seal. Slide governor assembly onto
throttle shaft. Install and tighten governor body screws.
AIR FILTER
SECONDARY
CONTROL
-SECONDARY
OPERATING
SPRING
■SECONDARY
OPERATING
DIAPHRAGM
SECONDARY
OPERATING
COVER
GASKETS
SCREW
PUMP DISCHARGE
NEEDLE
PUMP DISCHARGE
NOZZLE
Fig. H 9 -S e co n d a ry T h ro ttle O perating and C ontrol Assem bly
Fig. H 10~Pum p Discharge Needle Assem bly
CHEVROLET OVERHAUL M A N U A L SUPPLEMENT
Summary of Contents for 40 60 Series
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